Keum-Dong Jung, Byeong-Ju Kim, Yoo Chul Kim, Byung-Gook Park, Hyungcheol Shin, and Jong Duk Lee, “An Analytic Current-Voltage Equation for Top-contact OTFTs Including the Effects of Variable Series Resistance,” 2007 International Conference on Solid State Devices and Materials, pp.1080-1081, Tsukuba, Japan, September 19-21, 2007